A Level Biology Revision "The Link Reaction" @Freesciencelessons

Uploaded August 2023 | Updated September 2026, 1 day ago

You can find all my A Level Biology videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-biology

In this video, we look at the link reaction. First we explore what takes place during the link reaction and how many molecules we make of the products acetyl coenzyme A, reduced NAD and carbon dioxide. Finally, we explore why the link reaction is an example of oxidative decarboxylation.

A Level Biology Revision The Link Reaction

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$A Level Biology Revision Cell Fractionation You can find all my A Level Biology videos fully indexed at https://www.freesciencelessons.co.uk/a-level-revision-videos/a-level-biology/ In this video, we look at how organelles are separated by cell fractionation. First we look at the roles of a homogeniser and buffer. We then look at the relative sizes of the different organelles. Finally, we explore how the organelles are fractionated by ultracentrifugation. Image credits: Pancreatic acinar cells https://commons.wikimedia.org/wiki/File:Pancreatic_acinar_cells TEM.jpg Louisa Howard, Public domain, via Wikimedia Commons Heart dissected Samuel Levy, CC BY 3.0 https://creativecommons.org/licenses/by/3.0, via Wikimedia Commons Homogeniser https://commons.wikimedia.org/wiki/File:Tissue_glass_teflon_Dounce_homogenizer-02.jpg Lilly_M, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons Centrifuge https://commons.wikimedia.org/wiki/File:Multipurpose_centrifuge.JPG Retama, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons$

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